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SN 2021dbg: A Luminous Type IIP-IIL Supernova Exploding from a Massive Star with a Layered Shell

文献类型：期刊论文

作者Zhao ZY(赵泽毅)6,7,8,9; Zhang JJ(张居甲)6,7,9; Li LP(李丽萍)6,7,9; Zhai Q(翟倩)6,9; Cai YZ(蔡永志)6,9; Srivastav, Shubham5; Wang, Xiaofeng3,4; Lin H(林含)2,7,9; Yang, Yi1,4; Filippenko, Alexei V.1
刊名ASTROPHYSICAL JOURNAL
出版日期2024-10-01
卷号973期号:2
ISSN号0004-637X
DOI10.3847/1538-4357/ad5fe8
产权排序第1完成单位
文献子类Article
英文摘要We present extensive observations and analysis of supernova (SN) SN 2021dbg, utilizing optical photometry and spectroscopy. For approximately 385 days following the explosion, SN 2021dbg exhibited remarkable luminosity, surpassing most Type II SNe (SNe II). This initial high luminosity is potentially attributed to interaction between the ejected material and the surrounding circumstellar material (CSM), as evidenced by the pronounced interaction signatures observed in its spectra. The subsequent high luminosity is primarily due to the significant 56Ni mass (0.17 +/- 0.05 M circle dot) produced in the explosion. Based on the flux of flash emission lines detected in the initial spectra, we estimate that the CSM mass near the progenitor amounted to similar to(1.0-2.0) x 10-3 M circle dot, likely resulting from intense stellar wind activity 2-3 yr preceding the explosion. Considering the bolometric light curve, nebular spectrum modeling, and mass-loss rate, we suggest that the progenitor of SN 2021dbg was a red supergiant (RSG) with a mass of similar to 20 M circle dot and a radius of 1200 R circle dot. This RSG featured a thick hydrogen shell, which may have contained a region with a sharp decrease in material density, electron density, and temperature, contributing to its layered structure. This object demonstrates mixed features of Type IIP and IIL SNe, making it a transitional event linking the above two subclasses of SNe II.
学科主题天文学
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出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
WOS关键词LIGHT-CURVES ; P SUPERNOVA ; CIRCUMSTELLAR MATERIAL ; PROGENITOR MASS ; SHOCK BREAKOUT ; SPECTROSCOPIC EVOLUTION ; PHYSICAL-PROPERTIES ; LATE BEHAVIOR ; EXPLOSION ; PHOTOMETRY
资助项目National Key R&D Program of China[2021YFA1600404]; National Natural Science Foundation of China[12033003]; National Natural Science Foundation of China[12333008]; National Natural Science Foundation of China[12288102]; National Natural Science Foundation of China[12173082]; National Natural Science Foundation of China[12303054]; International Centre of Supernovae, Yunnan Key Laboratory[202302AN360001]; China Manned Space Project[CMS-CSST-2021-A12]; Yunnan Fundamental Research Projects[202401AU070063]; Yunnan Fundamental Research Projects[202401BC070007]; Yunnan Fundamental Research Projects[202201AT070069]; Top-notch Young Talents Program of Yunnan Province; Chinese Academy of Sciences; Tencent Xplorer Prize; Christopher R. Redlich Fund; W. M. Keck Foundation; CAS; People's Government of Yunnan Province
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001320440900001
出版者IOP Publishing Ltd
资助机构National Key R&D Program of China[2021YFA1600404] ; National Natural Science Foundation of China[12033003, 12333008, 12288102, 12173082, 12303054] ; International Centre of Supernovae, Yunnan Key Laboratory[202302AN360001] ; China Manned Space Project[CMS-CSST-2021-A12] ; Yunnan Fundamental Research Projects[202401AU070063, 202401BC070007, 202201AT070069] ; Top-notch Young Talents Program of Yunnan Province ; Chinese Academy of Sciences ; Tencent Xplorer Prize ; Christopher R. Redlich Fund ; W. M. Keck Foundation ; CAS ; People's Government of Yunnan Province
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/27621]  
专题云南天文台_丽江天文观测站（南方基地）
云南天文台_中国科学院天体结构与演化重点实验室
作者单位1.Department of Astronomy, University of California, Berkeley, CA 94720-3411, USA
2.Key Laboratory of Radio Astronomy and Technology, CAS, A20 Datun Road, Chaoyang District, Beijing 100101, People's Republic of China;
3.Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023, People's Republic of China;
4.Department of Physics, Tsinghua University, Beijing 100084, People's Republic of China;
5.Astrophysics Research Centre, School of Mathematics and Physics, Queens University Belfast, Belfast BT7 1NN, UK;
6.Key Laboratory for the Structure and Evolution of Celestial Objects, CAS, Kunming 650216, People's Republic of China;
7.International Centre of Supernovae, Yunnan Key Laboratory, Kunming 650216, People's Republic of China;
8.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 101408, People's Republic of China;
9.Yunnan Observatories (YNAO), Chinese Academy of Sciences (CAS), Kunming 650216, People's Republic of China; jujia@ynao.ac.cn;
推荐引用方式
GB/T 7714		 Zhao ZY,Zhang JJ,Li LP,et al. SN 2021dbg: A Luminous Type IIP-IIL Supernova Exploding from a Massive Star with a Layered Shell[J]. ASTROPHYSICAL JOURNAL,2024,973(2).
APA 赵泽毅.,张居甲.,李丽萍.,翟倩.,蔡永志.,...&Zheng, WeiKang.(2024).SN 2021dbg: A Luminous Type IIP-IIL Supernova Exploding from a Massive Star with a Layered Shell.ASTROPHYSICAL JOURNAL,973(2).
MLA 赵泽毅,et al."SN 2021dbg: A Luminous Type IIP-IIL Supernova Exploding from a Massive Star with a Layered Shell".ASTROPHYSICAL JOURNAL 973.2(2024).

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来源：云南天文台

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